Fix frontend API calls to use correct endpoint format

Updated PSU and DMM components to use the correct API endpoint format
without set_ and query_ prefixes. The API has smart resolution that
automatically maps:
- GET requests: partial names → query_* methods
- POST requests: partial names → set_* methods

Changes:
- PSU component:
  - GET: /voltage instead of /query_voltage
  - GET: /current instead of /query_current
  - POST: /voltage/{value} instead of /set_voltage/{value}
  - POST: /current/{value} instead of /set_current/{value}
  - GET: /output_voltage instead of /query_output_voltage
  - GET: /output_current instead of /query_output_current
  - GET: /output_power instead of /query_output_power

- DMM component:
  - POST: /mode/{value} instead of /set_mode/{value}
  - GET: /voltage instead of /query_voltage
  - GET: /current instead of /query_current
  - GET: /power instead of /query_power

This aligns with the API naming convention documented in CLAUDE.md
which prevents arbitrary method execution and enforces the security
model where only query_* and set_* methods are accessible.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: MarkoVcode

benchmesh-serial-service/frontend/src/ui/classes/DMM/GenericDMM.tsx

@@ -128,7 +128,7 @@ export function GenericDMM({ channelPath, registry }: { channelPath?: string, re
     const k = klass || 'DMM'
     const did = deviceId || '{id}'
     const ch = channel || '1'
-    return `/instruments/${k}/${did}/${ch}/set_mode/{value}`
+    return `/instruments/${k}/${did}/${ch}/mode/{value}`
   }, [klass, deviceId, channel])
 
   const handleModeChange = async (newMode: string) => {
@@ -404,9 +404,9 @@ function ReadonlyBigNumber({ kind, label, value, channelPath, parameter }: { kin
               </label>
             </div>
             <span className="psu-api" title={
-              kind === 'U' ? `GET ${channelPath}/query_voltage` :
-              kind === 'I' ? `GET ${channelPath}/query_current` :
-              kind === 'P' ? `GET ${channelPath}/query_power` : ''
+              kind === 'U' ? `GET ${channelPath}/voltage` :
+              kind === 'I' ? `GET ${channelPath}/current` :
+              kind === 'P' ? `GET ${channelPath}/power` : ''
             }>API</span>
           </>
         )}

benchmesh-serial-service/frontend/src/ui/classes/PSU/GenericPSU.tsx

@@ -67,8 +67,8 @@ export function GenericPSU({ channelPath, registry }: { channelPath?: string, re
       if (!channelPath) return
       try {
         const [rv, rc] = await Promise.all([
-          fetch(`${apiBase}${channelPath}/query_voltage`),
-          fetch(`${apiBase}${channelPath}/query_current`),
+          fetch(`${apiBase}${channelPath}/voltage`),
+          fetch(`${apiBase}${channelPath}/current`),
         ])
         if (!cancelled) {
           if (rv.ok) {
@@ -182,8 +182,8 @@ function EditableBigNumber({ kind, label, value, onChange, withSet, channelPath,
       {withSet && channelPath && (
         <>
           <button className="psu-set" type="button" disabled={busy} title={
-            kind === 'U' ? `POST ${channelPath}/set_voltage/{value}` :
-            kind === 'I' ? `POST ${channelPath}/set_current/{value}` : ''
+            kind === 'U' ? `POST ${channelPath}/voltage/{value}` :
+            kind === 'I' ? `POST ${channelPath}/current/{value}` : ''
           } onClick={async (e) => {
             e.preventDefault(); e.stopPropagation();
             if (busy) return
@@ -192,16 +192,16 @@ function EditableBigNumber({ kind, label, value, onChange, withSet, channelPath,
               const endp = (kind as string | undefined) || ((label as any)?.props?.symbol as string | undefined)
               const val = value || '0'
               let url: string | undefined
-              if (endp === 'U') url = `${apiBase}${channelPath}/set_voltage/${val}`
-              if (endp === 'I') url = `${apiBase}${channelPath}/set_current/${val}`
+              if (endp === 'U') url = `${apiBase}${channelPath}/voltage/${val}`
+              if (endp === 'I') url = `${apiBase}${channelPath}/current/${val}`
               if (url) await fetch(url, { method: 'POST' })
             } catch (err) {
               console.debug('SET failed', err)
             } finally { setBusy(false) }
           }}>{busy ? (<><span className="spinner"/>SET</>) : 'SET'}</button>
           <span className="psu-api" title={
-            kind === 'U' ? `GET ${channelPath}/query_voltage` :
-            kind === 'I' ? `GET ${channelPath}/query_current` : (channelPath || '')
+            kind === 'U' ? `GET ${channelPath}/voltage` :
+            kind === 'I' ? `GET ${channelPath}/current` : (channelPath || '')
           }>API</span>
         </>
       )}
@@ -266,9 +266,9 @@ function ReadonlyBigNumber({ kind, label, value, channelPath, parameter }: { kin
               </label>
             </div>
             <span className="psu-api" title={
-              kind === 'U' ? `GET ${channelPath}/query_output_voltage` :
-              kind === 'I' ? `GET ${channelPath}/query_output_current` :
-              kind === 'P' ? `GET ${channelPath}/query_output_power` : ''
+              kind === 'U' ? `GET ${channelPath}/output_voltage` :
+              kind === 'I' ? `GET ${channelPath}/output_current` :
+              kind === 'P' ? `GET ${channelPath}/output_power` : ''
             }>API</span>
           </>
         )}